Brother MFC 9760 User Manual

   Troubleshooting and Maintenance   75
MAINTENANCE
Paper is Jammed in the Paper Tray
1Pull the paper tray out of the machine.
2Remove any crinkled sheets.
3Adjust the guides inside the paper tray 
according to the paper you are using.
4Press down the paper to flatten it in the paper 
tray. 
5Reinstall the paper tray.
Paper is Jammed near the Drum Unit
1Open the front cover.
2Remove the drum unit but do not force it if it cannot be removed easily. Instead, pull the edge 
of the jammed paper from the...

76   Chapter 9
Difficulty with Operation
If you think there is a problem with the machine, check the table below and follow the 
troubleshooting tips.
DIFFICULTYSUGGESTIONS
General Printing Difficulties
The machine does not print. Make sure the machine is turned on. The toner cartridge and drum 
unit are installed properly. The interface cable is securely connected 
between the machine and computer. Check to see if LCD is showing 
an error message.
The machine prints 
unexpectedly or it prints...

   Troubleshooting and Maintenance   77
MAINTENANCE
How can I clear paper jams? See Document Jams and Paper Jams, page 74.
Copy Quality Difficulties
Vertical streaks appear in 
copiesSometimes you may see vertical streaks on your copies. Either the 
scanner or the primary corona wire for printing is dirty. Clean them 
both.
Print Quality Difficulties
Printed pages are curled.Thin Paper (60-69 g/m2) can cause this problem. Make sure you 
select the Paper Type that suits the paper in your paper tray. (See...

78   Chapter 9
The whole page is printed 
black.
Black Page
Clean the machine’s interior and the primary corona wire of the 
drum unit. (See Regular Maintenance, page 81  and Cleaning the 
Drum Unit, page 83.) Also, do not use heat-sensitive paper as it will 
cause this problem. After cleaning, if the printed pages are still 
black or the display shows CHANGE DRUM SOON, replace the 
drum unit with a new one. The drum unit may be damaged.
Nothing is printed on the 
page.
White page
Make sure that the...

   Troubleshooting and Maintenance   79
MAINTENANCE
Packing and Shipping the Machine
Whenever you transport the machine, use the packing materials that came with the machine. If you 
do not pack the machine correctly, you could void your warranty.
1Switch off the machine.
2Switch on the machine again. And leave it for 5 seconds.
3Lock the scanner lock lever.
The blue scanner lock lever is on the left side of the machine. Press it backward to lock it.
 
4Remove the drum unit assembly.
Do not turn off the...

80   Chapter 9
5Place the drum unit and toner cartridge assembly into the plastic bag and seal the bag 
completely.
6Close the front cover. Put the front output bin extension into position. 
7Switch off and unplug the machine from the AC outlet.
8Unplug the Parallel cable or USB cable from the machine.
9Wrap the machine in the plastic bag and place it in the original carton with the original packing 
material.
10Place documents (manual, printed material and CD-ROM), drum unit and toner cartridge...

   Troubleshooting and Maintenance   81
MAINTENANCE
Regular Maintenance
You can keep the machine in optimum condition by cleaning it on a regular basis. It is a good idea 
to clean the drum unit during this routine. Avoid using thinners or other organic solvents to clean the 
machine and do not use water.
Cleaning the Scanner 
Switch off and unplug the machine and lift the document cover. Clean the glass platen and white film 
with isopropyl alcohol on a lint-free cloth.
Lift the ADF unit. Clean the...

82   Chapter 9
Cleaning the Printer
1Switch off and unplug the machine.
2Open the front cover.
3Remove the drum unit assembly.
4Gently clean the scanner window with a clean soft dry cloth. Do not use isopropyl alcohol.
•Do not use isopropyl alcohol to remove dirt from the control panel. It may 
cause a crack on the panel.
•Do not use isopropyl alcohol to clean the scanner window or the toner 
sensor.
•Do not touch the scanner window with your finger.
•Handle the drum unit carefully as it contains toner....

   Troubleshooting and Maintenance   83
MAINTENANCE
Cleaning the Drum Unit
We recommend you place the drum unit on a drop cloth or large piece of disposable paper to avoid 
spilling and scattering toner.
1Clean the primary corona wire inside the drum unit by gently sliding the tab from right to left 
several times.
2Return the tab to the home position ( mark position) before reinstalling the drum unit.
3Install the drum unit into the machine. (See Replacing the Drum Unit, page 88.)
4Close the front...

84   Chapter 9
Replacing the Toner Cartridge
The machine can print up to 6,000 pages using a high yield toner cartridge (TN-6600). When the 
toner cartridge is running low, the display shows CHANGE TONER. The machine is supplied with 
a standard toner cartridge (TN-6300) that must be replaced after approximately 3,000 pages. Actual 
page count will vary depending on your average document type.
It is a good idea to keep a new toner cartridge ready for use when you see the toner low warning.
Discard the...